Mobile Sauna Build | Seattle, WA

8x16 Custom Mobile Sauna for Good Day Sauna

In July and August 2025, we built and delivered a fully custom 8×16 mobile sauna to Seattle, Washington for Good Day Sauna. This project was designed as a high capacity, off grid capable sauna built specifically for business use. With a hydraulic trailer system, custom porthole window, mirror pane privacy glass, and cedar accent features throughout, this build blends durability, mobility, and elevated design in one complete unit.

A lasting
relaxation

Handcrafted
for you

Anywhere
you go

To enhance
active health

Improving
wellbeing

Built for Business in Seattle, WA

A Commercial Mobile Sauna Designed to Stand Out

This 8×16 mobile sauna was built for a growing wellness business in Seattle with one goal in mind: create a large capacity unit that feels premium and operates smoothly in a commercial setting. The design blends traditional wood fired sauna culture with a bold modern exterior. Black metal siding contrasts with cedar accents, and the 4 foot circular porthole window creates a strong visual identity. Mirror pane privacy glass maintains a sleek exterior while protecting the guest experience inside. Built to travel and operate in multiple locations, the unit features a hydraulic drop axle trailer for easy setup and a solar powered lighting system, making it fully off grid capable.

Natural Light Without Compromising Privacy

Energy Efficiency and Heat Retention

Distinctive Visual Identity

This 8×16 sauna sits on a 21 foot trailer and weighs approximately 5,300 pounds. Designed as a hot room only layout with two level benching, it comfortably accommodates 15 to 20 guests. The interior features 1×4 STK cedar walls and ceiling, cedar benches, a sealed foil vapor barrier, airflow furring strips, and a one piece vinyl floor with drain for commercial use. A custom 4 foot circular porthole window anchors the design, complemented by dual pane insulated windows with privacy tint. Cedar slat accent walls with hidden LED lighting add warmth and depth. Heat is provided by the IKI Original Wood Stove with rocks, connected to a double wall pipe system. Fully insulated throughout, this build was completed and delivered to Seattle in four weeks.

Project Gallery

Endless finish options

From the cladding and benches to the shape of the stove, each BW sauna reflects the evolving craftsmanship, standards, and a deep commitment to detail. Part of that detail is bringing a selection of some of the best wood products available. Thermory is our exclusive provider of our wood library, offering natural and chemical-free finishes in a variety of textures and colors.

WE MAKE SAUNAS FOR WHERE YOU ARE

Frequently Asked Questions About Saunas

We are here for you. Let’s chat over a coffee if you’re in the Duluth area. If not, we are always available by phone to explore what an outdoor sauna could look like for your life.

How long should you sit in a sauna?

It depends on what you are searching for! If you want to rest, 15 to 30 minutes is plenty of time. If you want to cleanse and enhance your skin, 15 to 30 minutes is perfect. If you’re an athlete, resting after exercise can help minimize muscular pain and improve circulation.

For more information on this issue, please see “How long to stay in a sauna.“

Does sauna burn calories?

Factors like weight, age, and exposure duration affect calorie burn in a sauna, with a 30-minute session potentially burning 100–300 calories. Harvard Health found that infrared saunas can burn up to 1.5 calories per minute, while the American Council on Exercise estimates 50–150 calories in a hot session.

For more information on this issue, please see

“Does sauna burn calories?“.

How to use a sauna safely?

Listen to Your Body: If you feel uncomfortable, exit the sauna! It is better to prevent than to cure.
Stay Hydrated: Drink water before, during, and after your sauna session to replace lost fluids.
Session Duration: Two to three sessions per week, each lasting 15 to 20 minutes, is a decent start.
Sauna Etiquette: Shower before entering, dress lightly or with a towel for comfort, and keep talking to a minimal for a peaceful atmosphere.

For more information on this issue, please see “How long should you sit in a sauna?“.

Do saunas help you lose weight?

The short answer is yes—with some restrictions. Saunas generally promote weight reduction by sweating, which allows the body to shed water weight momentarily. During a typical 30-minute sauna session, you can lose roughly 0.1 to 0.6 kg (0,22 to 1,32 pounds). However, this is primarily water weight, which will return as you rehydrate.

For more information on this issue, please see “Do saunas help you lose weight.”

What are the health benefits of sauna bathing?

Sauna bathing offers numerous health benefits, including weight control, hormonal balance, cardiovascular health benefits, musculoskeletal pain relief, muscle pain reduction, respiratory system benefits, and relaxation. It promotes a deep state of relaxation, reduces stress, and improves overall well-being.

For more information on this issue, please see “How long you should stay in a sauna.“

Who should avoid or limit sauna sessions?

Sauna baths are safe for most healthy individuals, but precautions are needed for those with specific conditions like acute infections, heart problems, or fever. Heat exposure can affect certain drugs’ pharmacokinetics, so high blood pressure medicines should be taken before use. Also, saunas are safe for children to use under adult supervision.

For more information on this issue, please see “How long you should stay in a sauna.“

A Personal Experience

Finding Resonance

In the world, everything has a resonant frequency. From a board, to the engine in your car. We’ve captured this into instruments such as the marimba. A simple line of wood specifically sized to create notes. That note harmonizing perfectly with each other piece of wood comes together into beautiful music when played skillfully. In sauna design, we feel the same. Bringing together finishes, materials and textures that harmonize together to create a masterpiece. Perfectly tuned to your goals, the end result is a warm inviting space that doesn’t distract, but guides you into the relaxation of sauna.